Internally, plants are equipped with immune systems to defend against pathogens, and many produce chemicals to ward off attacks from potential predators, such as beetles, worms and other insects. Some plants also have spiky thistles and needles along their stems and branches to make them unappealing (and inedible) to prey, while others sprout colorful blossoms that are certainly pleasing to the eye, but more importantly, warn predators that plants have venom or toxic chemicals within.Continue Reading
Like humans, plants have immune systems that protect them against attack from pathogens. Just as hormones and chemicals defend people against viruses, bacteria and other diseases, the immune systems of plants contain chemicals and nutrients that fight off attacks from diseases and parasites. Many plants produce the chemicals that they need to build their defense systems during the earliest stages of life, while others begin producing those agents following encounters with foreign pathogens.
In addition to their active immune systems, plants secrete special chemicals, which are often scentless and invisible to the human eye but can be seen and smelled from afar by birds, insects and bugs. Some plants, instead of keeping predators at bay, produce sweet and syrupy substances that attract aphids, worms and other organisms; these syrups are consumed by those organisms and contain toxins that ultimately kill them.Learn more about Botany
Several parts of rose plants are considered edible by many insects, birds and mammals, including humans. Although most roses are protected by thorns, the petals, seeds and fruit, known as rose hips, are a natural part of the food chain for many animals.Full Answer >
Sundew plants capture and digest insects. Their leaves are lined with sticky hairs containing a digestive enzyme produced by glands in the leaf. When prey land on the plant, they are wrapped up by the leaves, and glands secreting the enzyme begin their work. Some varieties of sundew actively trap insects, curling around them as they struggle to insure maximum contact with the deadly enzyme.Full Answer >
Pollination may occur as cross-pollination between plants, or when bees, insects and birds transport and replant pollinated seeds and spores. Pollination takes place naturally in several ways, without human intervention. Some plants have the ability to repopulate among each other via the technique of cross-pollination, although most organisms rely on wind currents or pollinators, such as bees, birds and other insects to complete the process.Full Answer >
Stag beetles are omnivores, meaning they eat both plants and other insects. However, they prefer eating plants and only eat other insects if no other food source is available.Full Answer >